Christian M. Petrucci

Bryan is a partner at the firm and has experience in counseling and representing clients on a range of environmental and energy matters. Bryan’s practice has focused on regulatory compliance and transactional matters, particularly in the areas of air and water quality, redevelopment, sustainability, permitting, energy efficiency and renewable energy development. Over the last several years, Bryan has primarily worked with complex regulated industries, notably including petroleum refinin...

Kaitlyn R. Maxwell is a top attorney recognized by Best Lawyers in the practice area(s) of Environmental Law and Litigation - Environmental. Kaitlyn R., who practices law in Philadelphia, Pennsylvania, has been recognized since 2025. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Kaitlyn R. is held by other top lawyers in the same geographic and legal practice area.

Brett Zeitlin is a top attorney recognized by Best Lawyers in the practice area(s) of Family Law. Brett, who practices law in Philadelphia, Pennsylvania, has been recognized since 2023. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Brett is held by other top lawyers in the same geographic and legal practice area.

A graduate of the University of Pennsylvania and its law school, Marc Jonas is co-chair of the firm's Land Use and Zoning practice group. He has extensive experience in real estate, land use, municipal law, and zoning matters, representing individuals, businesses, institutions, non-profit organizations and municipalities. Marc has practiced land use and real estate law for more than 30 years. In his career, Marc has appeared as counsel in Pennsylvania state and federal courts in matters invol...

Michael Clarke is a top attorney recognized by Best Lawyers in the practice area(s) of Municipal Law. Michael, who practices law in Trevose, Pennsylvania, has been recognized since 2024. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Michael is held by other top lawyers in the same geographic and legal practice area.

William A. Denmark is a top attorney recognized by Best Lawyers in the practice area(s) of Construction Law. William A., who practices law in Philadelphia, Pennsylvania, has been recognized since 2013. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which William A. is held by other top lawyers in the same geographic and legal practice area.

With over 40 years of experience, Martina Walsh McLaughlin has a distinguished career and stellar reputation representing clients in a wide variety of complex civil litigation cases, including medical malpractice, product liability, highway design, and dram shop cases. She has represented many families who suffered devastating losses, including a new father whose wife died in childbirth, parents of a healthy newborn who suffered brain damage only hours after birth, the mother of a constructio...

A former Chief Deputy City Solicitor for the City of Philadelphia, Ralph J. Teti is a partner with Willig, Williams & Davidson. He focuses his practice on labor representation, including representation of clients in grievance and interest arbitrations, state and federal courts, and before numerous boards, agencies and commissions. Considered by his peers as a leading authority on federal and state election law and regulation, Ralph also serves as counsel for political candidates, politica...

David J. Colleran is a top attorney recognized by Best Lawyers in the practice area(s) of Medical Malpractice Law - Plaintiffs, Personal Injury Litigation - Plaintiffs and Product Liability Litigation - Plaintiffs. David J., who practices law in Philadelphia, Pennsylvania, has been recognized since 2020. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which David J. is held by other top lawyers in the same geographic and legal practice area.

William H. Catto is a top attorney recognized by Best Lawyers in the practice area(s) of Litigation - Construction and Litigation - Labor and Employment. William H., who practices law in Philadelphia, Pennsylvania, has been recognized since 2024. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which William H. is held by other top lawyers in the same geographic and legal practice area.